Two hand safety lever



Oct. 18, 1938. F'BARNEY 2,133,526

TWO HAND SAF'ETY LEVER Fil ed Dec. 28, 1956 .v I v 4 3 I 21 3 l8Patented Oct. 18, 1938 TWO SAFETY LEVER Freeman Barney, Grand Haven,Mich.,. assignor to Elie ChallengeMachinery Company, Grand Haven, Mich.,a. eorporationof Michigan Application December as, 1936, SeriaLNo.117,875

4 Claims. (o1..192-1'31') This invention relates to asafety leverwhich,

while it may be used with many types of ma-- chinery, has been usedby'me in conjunction with the operation of paper cutting machines.

nected by a link I I with the arm Q'previouslydescribed, and ahorizontal arm I2 to which the lowerend" portion of a Vertical rod I3'is suitably connected, the rodextending for the major por- In machineswhich are lever operated and in tion of" its length through thetubularlever 4 5;. which there are moving partsthat are dangerous and intothelower end of the handle portion 4a. to the hands of the operator, thepresent inven-- A horizontal bar l4- passes through slots I5 in tion isof particular utility as an operation canoppositesides of'the handle an,the length of the not be performed unless both hands of the 0p-- slotsbeing' greater than the widthof the bar I4.

erator are used, thus insuring against onehand The upper end of the rodI2 is pivotally con- 10 which is not used and being accidentally placednected to the ba l4 midway between its ends. in any position to beinjured by the moving'parts Two operating bell' crank levers are mounted0f the mac ine. as o p knife in at different vertical positions atopposite sides of paper cutting machines. the handle 4a. The-lower leverhas arms I6 and An n r n in of h pre n inv n n- I T, the formerextending in a substantially ver- I5 an the Construction y means f WhichI tical direction and the latter outwardly in a-horiance against injuryis attained may be'had from zontal direction. A link I9 connects theouter the following description takenin connection end of the arm ITwith one end of the bar I4. with the accompanying drawing in which; Theupper lever has vertical and horizontal arms ig- 1 s an elevation oftheinovel hand lever l9 and 20 respectively. the arm 20 extending 20:

structure of my invention; outwardlyin a direction opposite to theexten- Fig. 2 is a fragmentary e e ev sion' of the arm I1. A longer link2I connects upper part thereof, and the free end of the arm' 20 with theopposite end- Fig. 3 is a transverse section on the plane of of thebar'II. The two bell crank levers are 5 line 33 of Fig. 1 looking downwardlyin the dipartly inserted through vertical slots cut in the motionindicated by the arrows. opposite sides of the tubular handle 4a; andare Like reference characters refer to like parts'in pivotally connectedon" suitable pins extending the different figures of the drawing.through the handle substantially at the angles On a suitable stationaryor part I of the maof'saidlevers.

chine to which the hand lever is applied, a A coiled tension spring 22is connected at one 30 ratchet 2 is permanently secured with the ratchetend to the arm 5 and at its opposite end to the teeth located around thearc of a circle, the arm I2. The force of the spring tends to turncenter of which is the axis of av Shaft 3 Which the bell crank leverconsisting of arms I0 and I2 passes t o h the ratchet member 2 andrearin a clockwise direction thereby moving the rod Wa d y into themachine having suitable connec- I3 downwardly and tilting the two leversmount- 35 tions o moving t e cutting knife, in a paper ed on the handleto the position shown in Fig. cutting machine, downwardly oncounterclock- 1, wherein the vertical arms I6 and I9 are turned wiserotation of the shaft and for elevating the outwardly so as to lie at anangle to the vertical, knife on clockwise rotation thereof. A hand andextend partly beyond the adjacent opposite 0 lever 4 is keyed at itslower end to the shaft 3. sides of the handle 4a. Likewise the action ofPreferably its upper portion will consist of a the spring is to turn thedog I into position to handle section 411, both the parts 4 and 4a beingen age with th r tchet 2, of tubular form. To rock the shaft 3 toperform the operation A bracket having diverging arms 5 and 6 is ofcutting paper for example, the ratchet 1 must secured to either thehandle or the shaft or both b di i B t hands m t be d, one t 45 so as tomove therewith. On the lower arm 5 a grasp and turn the arm I9 inwardlyand the ratchet engaging dog I is mounted on apivot pin other to do thesame thing to the arm I6. If 8 which extends through the arm 5. The dogone arm, I6 or I9, only is operated there will be is at the inner sideof the arm 5 and in a posino disengagement of the dog I from the ratchettion that when turned counterclockwise it en- 2. This insures that bothhands of the operator 50 gages with the ratchet. An arm 9 is securedwill be engaged with the operating lever and will to the pivot 8 at theouter side of the bracket therefore be safe from injury. In the operaarm5. At the end of the upper bracket arm 6 a tion the lever 4 is turned tothe left (referring bell crank lever is pivotally mounted. It into Fig.1). To return the lever to its original cludes a downwardly extendingarm I 0, conposition both hands are not needed as the dog 55 will slipover the ratchet teeth, but in such case the paper knife is beingelevated and there is no danger of injury such as is present when thepaper knife is being lowered in the operation of cutting paper.

With the structure described, the rod I3 is located for its majorportion within the tubular lever 4, and the bell crank members l6 and I9are located in narrow slots in the handle 4a which are but slightlywider than the thickness of said arms. The fingers or fleshy part of thehand are thus protected against pinching and there is little or noexposed mechanism with which the operator may come'into contact in anymanner so as to prevent a liability of injury.

The construction described while of a simple character is one which hasproven particularly practical and useful. The invention is defined inthe appended claims and is to be considered comprehensive of all formsof structure coming within the scope of the claims.

I claim:

1. In combination, a pivotally mounted tubular lever, a ratchetassociated therewith, a spring actuated dog normally engaging theratchet, a rod located lengthwise of and within said lever for the majorportion of its length, means connecting the rod with the dog whereby thedog is disengaged from the ratchet on longitudinal movement of the rodin one direction, a bar extending transversely through the lever, theupper end of said rod being pivotally connected to said bar, two bellcrank handle members located in slots in opposite sides of the upperportion of said lever, one above the other, having oppositely extendingarms, links connecting said arms with the ends of'said bar, and meansfor pivotally mounting said bell crank levers, said levershavingupwardly extending arms located in vertical slots in the upper portionof said lever.

2. Operating means for a ratchet dog associated with a pivotally mountedtubular hand lever comprising, a rod extending longitudinally throughthe lower portion of said lever, a horizontal bar extending laterallythrough said lever at the upper end of the rod, the rod having pivotalconnection substantially at the midpoint of said bar and said handlehaving vertical slots through which the bar passes of greater heightthan the width of the bar, said bar adapted to slide therein, two bellcrank levers located one above the other and at opposite sides of andextending into slots in opposite sides of the upper portion ofthe'lever, means pivotally mounting said bell crank levers on the lever,said bell crank levers having opposite outwardly extending arms,

and links connecting the ends of said arms with the ends of said bar.

3. In combination with a movably mounted hand lever of tubular form, arod extending vertically into said hand lever at the lower portionthereof, said hand lever at its upper end portion having two verticalslots, one above the other in opposite sides thereof, and two additionalvertical slots below, the first slots directly opposite each other andat the upper end of said rod, a bar extending laterally through the lastmentioned slots pivotally connected at substantially its middle point tothe upper end of the rod, and operating devices extending one througheach of the first mentioned slots and movably mounted on the hand lever,combined with means connecting the same to the opposite ends of said barwhereby longitudinal movement of said rod in a vertical directionrequires operation of both of said operating devices.

4. In combination, a tubular hand lever, said lever having verticalslots in opposite sides thereof near its upper end, one of said slotsbeing located above the other, and also slots below the first slotsdirectly opposite each other, a horizontal bar having a width less thanthe height of said last mentioned slots extending laterallytherethrough, a rod pivotally connected at its upper end to said barextending downwardly through the hand lever from the bar, flat bellcrank levers, each having a-vertical arm and an outwardly extending arminserted into the first mentioned slots and pivotally mounted on thehand lever, and links connecting the outer ends of said horizontal armswith the ends of said bar whereby on pivotally turning both of said bellcrank levers inwardly so that the vertical arms thereof are broughtflush at their outer edges with the outer surface of the hand lever,said horizontal bar and rod attached thereto are lifted vertically.

FREEMAN BARNEY.

